You call yourself a hobbyist while acting more like a professor to most of us. Hope you get the recognition you deserve and continue to grow.

This video couldn't have come at a better time! I stared building my first robot last weekend and this weekends job is building the hardware internet for my motor controller. Great tutorial

These tutorials are making ROS accessible for a ton of people, including me. I'm a hobbyist, and I don't always have the time to do deep dives into documentation and codebases. Being able to use these tutorials to get a good foundation has been extremely helpful.

Great job! Thanks for all of your eye opening videos, keep it going🎉

An awesome 45 minute thank you

Awesome work Josh! Many thanks for sharing and going into the nitty gritty details!

Best tutorial about hardware interfaces. Was craving for this👍

This video is truly a lifesaver, thanks!

Your videos have helped me tremendously in my career as a robotics engineer. Could you please make a series on Movit2

is the process similar for ros1_control too ?? glad to see that you are getting sponsors ( meaning you will keep uploading ) , you deserve it.

Josh this is literally the task I have to do for my project today. I haven't watched the video yet but I was dreading the task due to the lack of documentation. Have been putting it off for a bit. You're an absolute legend and a hero. Can't even express how excited I was to see the title.

Cheers Josh! I know how im spending my Sat night.

Good day and thanks for the video!

Incredible video !

You are amazing, thank you very much !!

I saw all of your videos about ros2_control and they are really good material. I think that you should make a video using microROS on your microcontroller and so you will have everithing under ROS2

i love this video series!!

Great job!

Performance here is critical, and especially on the Arduino side. Make sure you read the Serial I/O data one byte at a time, and make sure you loop through the bytes: while(Serial.available()) { char ch = Serial.read(); } ... calculate, and control the motors as quickly as possible in loop() and keep everything straightforward (no classes, data structures, etc). All simple functions and global variables. I learned the hard way and my robot was jerky, twitchy, and not good at driving around.

HI, It was a great lecture, thanks for sharing with us. I was able to follow most part of it, but i was unable to understand where input and output ports to arduino are connected in the hardware interface plugin. thanks a lot for sharing with us.

Thank you for your wonderful video. Can i ask you a question about how the robot on rviz2 moving even though the wheel does not rotate?

Hello! a big fan here. May i ask if what is the point of this if I can just use a calculation to convert cmd_vel (from Twist) to left and right motor velocity? And with a Lidar, I'll just use a laser scan matcher for the odometry of the robot.

fantastic. thank you, Josh. I should also mention that example_2 was updated on the repo a couple of weeks ago to use TwistStamped messages, which means it might not work with the teleop_twist_keyboard. I tried to map the cmd_vel to cmd_vel_stamped, but it didn't work. I ended up sending messages from the cli. Maybe try to insert this line into the /config/diffbot_controllers.yaml file (under ros parameters). use_stamped_vel: false

So cool! As all of your videos.. Can you do something about OpenRMF framework from open robotics! I would love it

Hi Josh, can you clarify how you are getting the connection string to the robot " /dev/serial/by-path/platform-fd500000.pcie-pci-0000:01:00.0-usb-0:1.3:1.0-port0", my serial connection is failing when connecting to the arduino, also is there a way to simulate serial connection so I can see it on a terminal instead of receiving the string in an actual device. Great Tutorial by the way

the cpp code that is processing the encoder counts is running in the py or in the arduino? didn't see you flash the arduino

Awesome videos sir! I have a question, you have been writing all the nodes as a .launch.py file but not as a pub/sub Python file. Is there any specific reason? Thank you so much sir.

Is there any special integration between ros control and micro Ros?

Hey Josh, can I add additional sensors to the interface? how do I add IMU to this? I just need to know if I'm editing the right file. I'm a noob, please help.

First of all, congratulations on this great video. I have been working on something for several days now. I am trying to create a hardware interface that reads data from a topic (I am using micro-ROS and cannot find another way to do it). The only idea I had was to implement a socket to another node acting as a server. Do you have any ideas if it is possible to use topics directly in the hardware interface?

Please make video on tricycle controller 🙏

In the future, I hope you can cover Nvida Isaac Sim.

I have a question, does this ros control code needs to run on Linux with ros or needs to run on the microcontroller with microros or rosserial. And if the code run on Linux what should run on the microcontroller to allow the ros comunication and wich topics should it publish/subscribe

Hi Josh, I doubt you will see this but I wanted to ask, The robot we are building for a project does not have encoders on the wheels instead we get the odometry with the lidar, this means that the motors only take an input, what do I need to change for the hardware interface for this to actually function?

Thank you Josh for the best videos as always! I just have a question tho, if I were using a robot with a mecanum drive, would I just expand the plugin to account 4 motors? How does ros know how to deal with the very different kinematics then, I feel like I don't really grasp where the kinematics of a mecanum drive should be written

If I don't have wheel encoders and am instead generating the odometry with a lidar, how should I go about creating the controller?

I'm curious if you know of any systems that are "bigger" than rviz2, which can do more mission-level stuff. There's the "Commander API" in ros-navigation, but is there anything more big-picture out there that would make it easy to create some repeatable mission route of some sort?

Hii, Can I control and communication with Pioneer 3DX robot using ros2_control which designed to supported by the ARIA, a C++, package or library? Your reply will be very helpful for me.

Can you make a video that involve c++ algorithm to control real robot with ros

Which ros version are you using for this , ros2-focy or any other ??

update your course to humble please! Lastly, I would like to grateful to you for your teaching

I installed ros2 humble on pi 4 it runs the examples but wont open with ros2 command even if I source bash first . It's there but wont open thanks for any help.😁👍cool video!

I need an ROS2 control plugin for the Open Manipulator-X arm (hardware). I'm trying to write it because I haven't found it open-source. However, I'm new to this, so any help would be appreciated.

Hi. I'm new here but i got a problem with diff controller. When I use the teleop_keyboards, it seems nodes are correctly but my robot doesn't move. I don't understand what happend

Hi josh one question is the pi3 with 1GB ram enough for uploading ros

Does anyone else get the TextSubstitution error when running the diffbot.launch example? I'm just running the example_2 launch file but i haven't edited anything yet, was wondering if there's been a recent update?

for hardware_interface, seems on_deactive, on_cleanup and on_shutdown will not be called and can not be graceful shutdown. do you know how they work?

Hi @JoshNewans How could i do if i am using in Foxy ?

Is there a way to do the hardware setup using Python?

hello! thanks for this great video! I am new to ROS2. When building then running the example 2 package I get : [ERROR] [launch]: Caught exception in launch (see debug for traceback): executed command failed. Command: /opt/ros/humble/bin/xacro /home/bobby/control_ws/install/ros2_control_demo_example_2/share/ros2_control_demo_example_2/urdf/diffbot.urdf.xacro use_mock_hardware:=false Captured stderr output: error: package not found: "package 'ros2_control_demo_description' not found, searching: ['/home/bobby/control_ws/install/ros2_control_demo_example_2', '/opt/ros/humble']" when processing file: /home/bobby/control_ws/install/ros2_control_demo_example_2/share/ros2_control_demo_example_2/urdf/diffbot.urdf.xacro rosdep gives me: rosdep install -i --from-path src --rosdistro $ROS_DISTRO -y ERROR: the following packages/stacks could not have their rosdep keys resolved to system dependencies: ros2_control_demo_example_2: Cannot locate rosdep definition for [ros2_control_demo_description] any ideas on what to do to fix this. A quick internet search sent me many directions... I am going to try going through the ros2_control docs and tutorials as well.